cciss: WARNING/BUG in do_cciss_intr (it's back)

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Hi Mike,

Was there any debugging code added to try to help with this problem?
or is that the WARNING before the BUG?


Booting 2.6.29-rc3-git6 oopsed with:

calling  cciss_init+0x0/0x2e [cciss] @ 733
HP CISS Driver (v 3.6.20)
ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 54
cciss 0000:42:08.0: PCI INT A -> Link[LNKA] -> GSI 54 (level, high) -> IRQ 54
cciss 0000:42:08.0: irq 56 for MSI/MSI-X
IRQ 56/cciss0: IRQF_DISABLED is not guaranteed on shared IRQs
cciss0: <0x3238> at PCI 0000:42:08.0 IRQ 56 using DAC
------------[ cut here ]------------
WARNING: at drivers/block/cciss.c:225 do_cciss_intr+0x58f/0x99a [cciss]()
Hardware name: ProLiant BL685c G1
Modules linked in: cciss(+) ehci_hcd ohci_hcd uhci_hcd
Pid: 0, comm: swapper Not tainted 2.6.29-rc3-git6 #1
Call Trace:
 <IRQ>  [<ffffffff8023a741>] warn_slowpath+0xd3/0xf2
 [<ffffffff80243a44>] ? __mod_timer+0xc1/0xd3
 [<ffffffff8041469f>] ? smi_timeout+0xd9/0xe5
 [<ffffffff8024f86a>] ? ktime_get_ts+0x49/0x4e
 [<ffffffff804145c6>] ? smi_timeout+0x0/0xe5
 [<ffffffffa0024c4b>] do_cciss_intr+0x58f/0x99a [cciss]
 [<ffffffff8026ed21>] handle_IRQ_event+0x27/0x57
 [<ffffffff8027057d>] handle_edge_irq+0xde/0x11f
 [<ffffffff8020e302>] do_IRQ+0xdc/0x152
 [<ffffffff8020ca13>] ret_from_intr+0x0/0xa
 <EOI> <4>---[ end trace a8b437cd48391e28 ]---
BUG: unable to handle kernel NULL pointer dereference at 00000000000000f4
IP: [<ffffffffa0024c93>] do_cciss_intr+0x5d7/0x99a [cciss]
PGD 0
Oops: 0002 [#1] SMP
last sysfs file: /sys/block/ram15/dev
CPU 2
Modules linked in: cciss(+) ehci_hcd ohci_hcd uhci_hcd
Pid: 0, comm: swapper Tainted: G        W  2.6.29-rc3-git6 #1
RIP: 0010:[<ffffffffa0024c93>]  [<ffffffffa0024c93>] do_cciss_intr+0x5d7/0x99a [cciss]
RSP: 0018:ffff88027f12fef0  EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff88007f840270 RCX: 0000000000013888
RDX: 0000000000008080 RSI: 0000000000000046 RDI: 0000000000000009
RBP: ffff88027f12ff20 R08: 000000447f12fa70 R09: ffff88017e540700
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88007f8404b0
R13: ffff88027e1a0000 R14: 0000000000000000 R15: 0000000000000086
FS:  0000000000680850(0000) GS:ffff88017f121380(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00000000000000f4 CR3: 0000000000201000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process swapper (pid: 0, threadinfo ffff88017f164000, task ffff88017fa5d4c0)
Stack:
 0000000000000001 ffff88027f126280 0000000000000000 0000000000000000
 0000000000000038 0000000000000000 ffff88027f12ff50 ffffffff8026ed21
 ffffffff8076e000 0000000000000038 ffff88027f126280 ffffffff8076e054
Call Trace:
 <IRQ> <0> [<ffffffff8026ed21>] handle_IRQ_event+0x27/0x57
 [<ffffffff8027057d>] handle_edge_irq+0xde/0x11f
 [<ffffffff8020e302>] do_IRQ+0xdc/0x152
 [<ffffffff8020ca13>] ret_from_intr+0x0/0xa
 <EOI> <0>Code: 50 08 48 c7 83 40 02 00 00 00 00 00 00 49 c7 44 24 08 00 00 00 00 8b 83 34 02 00 00 85 c0 0f 85 49 03 00 00 4c 8b b3 50 02 00 00 <41> c7 86 f4 00 00 00 00 00 00 00 4c 8b 83 28 02 00 00 66 41 8b
RIP  [<ffffffffa0024c93>] do_cciss_intr+0x5d7/0x99a [cciss]
 RSP <ffff88027f12fef0>
CR2: 00000000000000f4
---[ end trace a8b437cd48391e29 ]---
Kernel panic - not syncing: Fatal exception in interrupt



This is on an HP ProLiant BL685c G1, 4-proc system with
8 GB of RAM.  (same as previous reports)


Rebooting worked successfully.

Thanks,
-- 
~Randy
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